joint nonparametric confidence interval

例句：

1. 1. The joint between thetwo pieces of wood is loose.
   两块木头之间的接合处松动了。
2. 2. The scientistused a microscope to examine the jointsin the bone.
   科学家用显微镜检查了骨头中的接合处。
3. 3. Theteam worked together to fixthe joint that was causing thecar to shake.
   团队共同努力修复了导致汽车抖动的接合处。